Trouble code · Powertrain · Generic (all makes)

P0715 Input/Turbine Speed Sensor 'A' Circuit

The transmission isn't getting a usable signal from the sensor that measures how fast the transmission's input shaft is turning.

Safe to drive?
Drive with caution
Get it fixed soon
Scanner you need
Any OBD2 scanner
Even a basic code reader shows it
NHTSA complaints quoting it
12
Vehicle complaints, 2015–2025

Common causes

  • Failed input speed sensor
  • Damaged wiring or connector
  • Metal debris on the sensor
  • Low or contaminated transmission fluid

Symptoms

  • Harsh or erratic shifting
  • No torque converter lock-up
  • Stuck in one gear (limp mode)
  • Speedometer problems on some cars

Can I drive with it?

Drive gently and get it checked soon. If the transmission is stuck in one gear, avoid highways.

Tip: Check the transmission fluid level and condition before replacing the sensor – debris can upset the sensor's reading.

Which scanner reads it?

Any OBD2 scanner reads the basic code. A multi-system scanner can read the transmission module directly for more detail.

Budget tools like the ANCEL AD310 read it; tools with live data and graphing – like the BlueDriver or OBDLink MX+ – help you find the cause. Not sure which fits you? Try the Find My Scanner quiz.

In the data

Of the vehicle complaints owners filed with NHTSA from 2015 to 2025, 12 quote P0715 – most often from Ford, Mazda, Nissan owners. Complaints lean toward serious problems, so treat this as a sign of how often the code turns up in real reports, not how often cars get it.

Both sources are compared on the Trends page.

General information to help you understand a code – not a diagnosis. Your car’s service information or a qualified mechanic has the final word. See how we research.